MLA
Co., E. C. Kropp. Uncle Billy Brown. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/098z8w9gkc-cor.
APA, 6th edition
Co., E. C. K. Uncle Billy Brown (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9gkc-cor.
Chicago
Co., E. C. Kropp. “Uncle Billy Brown.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9gkc-cor.